The KPI is throwing an exception as 'null'. It used to work fine previously.
There might have been a change in the data model at the backend which might have impacted the KPI configuration (measures and dimensions used). One of the possible causes is as below: When the column name is same across different/same dimension in the data model then, the 'parameter name' should also be same. In the attached doc containing screen print, the column names are different therefore, the parameter names also have to be different.